MECHANICS (errors in the use of apostrophes)

the answer is a.

A.Burt and Loni's breakup made front-page news in the tabloids for weeks.

B.Eileen Farrell's foray into the blues was successful, but the singer's commitment to opera reigned supreme.

C.The giraffe stretched its neck over the fence to reach the tender green leaves.

D.He had collections of campaign buttons from the 50s, all bearing the slogan "I like Ike."