Multiple Choice

Which of the following correctly underlines the subject of the sentence and bolds the correct form of the verb in parentheses?
Emeralds (is, are) a rarer find than diamonds.
(1 point)
• Emeralds (is, are) a rarer find than diamonds.
• Emeralds (is, are) a rarer find than diamonds.
Emeralds (is, are) a rarer find than diamonds

• Emeralds are a rarer find than diamonds.