quicum ludere, quem in sinu tenere--> these relative pronouns refer to: *hint* look at the gender of the pronoun to rule out one of the answers.

cui primum digitum dare appetenti

et acris solet incitare morsus. What word does acris modify (remember, in classical Latin, sometimes authors substituted an -is ending on third declension non/acc plurals instead of writing -es)

carum nescio quid lubet iocari. --> if it's deponent, how does iocari translate?

carum nescio quid lubet iocari

et solaciolum sui doloris,--> sui, "his, hers, its" modifies which word? (remember, an adjective takes its case from the noun it modifies. Look at the -i at the end and find another case that is the same!)

credo ut tum gravis acquiescat ardor:

credo ut tum gravis acquiescat ardor:

credo ut tum gravis acquiescat ardor: What noun does this adjective modify?

tecum ludere sicut ipsa possem

tecum ludere sicut ipsa possem

tecum ludere sicut ipsa possem

tecum ludere sicut ipsa possem