Which of These Compounds Can React with 4-Methylpentanal to Afford

Multiple Choice

Which of these compounds can react with 4-methylpentanal to afford good yields of the crossed aldol product?

A) 3-(4-Nitrophenyl) propanal
B) 2-Ethyl-2-methylheptanal
C) 2-(4-Nitrophenyl) propanal
D) 3-(4-Nitrophenyl) -2-butanone
E) None of the above compounds will give good yields of the crossed aldol product with 4-methylhexanal.