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.
This one is A- the sentence would be, “Accordinf to some studies, the children who touch the books physically before three years old are more LIKELY to have a good reading habit LATER in life.”
