THE CORRECT ANSWER IS THERE / THEIR.DEFINITIONS

8. The correct answer is There / their.Definitions:their - adj. the possessive form of they, used as a modifier before a nounthere - pron. used to introduce a clause or sentencethey're - contraction of they areExplanation:There is used to introduce a clause or sentence; therefore, the correct answer must be c or d. Their is an adjective modifying a noun. In this case, tests is the noun, and their describes whose tests. Therefore, the correct sentence is "There were 50 questions on their tests".