Which of the Following Is Consistent with the Word-Superiority Effect

Which of the following is consistent with the word-superiority effect?

A) You can find letters faster by searching for letters rather than by reading words.
B) You can recognize the difference between C and J alone faster than in COIN and JOIN.
C) You can recognize the difference between C and J faster in XQCF and XQJF than in COIN and JOIN.
D) A single letter can be identified faster when people read the whole word than when they focus attention on the critical letter.