In 1934 physicist Eugene Wigner posited the existence of a crystal consisting entirely of electrons in a honeycomb-lik structure. The so-called Wigner crystal remained largely conjecture, however, until Feng Wang and colleagues announced in 2021 that they had captured an image of one. The researchers trapped electrons between two semiconductors and then cooled the apparatus, causing the electrons to settle into a crystalline structure. By inserting an ultrathin sheet of graphene above the crystal, the researchers obtained an impression-the first visual confirmation of the Wigner crystal. Mark for Review Which choice best states the main idea of the text? A Researchers have obtained the most definitive evidence to date of the existence of the Wigner crystal. B Researchers have identified an innovative new method for working with unusual crystalline structures. C Graphene is the most important of the components required to capture an image of a Wigner crystal. D It's difficult to acquire an image of a Wigner crys al because of the crystal's honeycomb structure.

## Step 1<br />The problem is asking us to identify the main idea of the given text. The main idea is the primary point or concept that the author wants to convey to the reader.<br /><br />## Step 2<br />The text discusses the discovery of a Wigner crystal, which is a crystal structure made entirely of electrons. It also mentions the method used by researchers to capture an image of this crystal.<br /><br />## Step 3<br />We need to evaluate each option in light of the information provided in the text.<br /><br />## Step 4<br />Option A states that researchers have obtained the most definitive evidence to date of the existence of the Wigner crystal. This aligns with the text, which mentions that the researchers have captured an image of the Wigner crystal, providing visual confirmation of its existence.<br /><br />## Step 5<br />Option B suggests that researchers have identified an innovative new method for working with unusual crystalline structures. While the text does mention a new method used by the researchers, this is not the main idea of the text.<br /><br />## Step 6<br />Option C suggests that graphene is the most important component required to capture an image of a Wigner crystal. The text does mention the use of an ultrathin sheet of graphene, but it is not the main focus of the text.<br /><br />## Step 7<br />Option D suggests that it's difficult to acquire an image of a Wigner crystal because of the crystal's honeycomb structure. The text does not mention any difficulty in capturing the image due to the structure of the crystal.