"there is little reason to fear that women will acquire too much courage or fortitude, for their apparent inferiority…" what choice most closely defines the underlined word? question 15 options: anxiety strength ability fear

I suppose the underlined word is "fortitude". The word that most closely defines it would be strength. Fortitude means courage in a dangerous or adversary situation; endurance, resilience. This passage draws on the traditional, patriarchal prejudice of women as frail, weak creatures that have to rely on men for courage and strength.

Not b or c so that leaves you with a or d. a is the better choice.