37.
Your Answer is
Correct Answer is A
Explanation
According to the meaning of the sentence "At the age of 80, she held her first solo art exhibition", the word order of item A is correct.
Item B: at the age of eighty modified show error.
Item C: at the age of eighty modified art error.
Item D: The emphatic sentence (it is/was...that/who...) cannot be guided by when.