You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: ADD A LETTER 
Clue: Confer if you wish, but if you add a letter to "confer", it becomes this type of evergreen
conifer

Category: THE TOWER 
Clue: Lightning not only strikes the same place twice, it strikes this 110-story Chicago tower hundreds of times a year
sears tower

Category: SIGNIFICANT MOTHERS 
Clue: She was the mom of Catherine of Aragon, Henry VIII's first wife

queen isabella of spain