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 consistency, answers should be in all lower cased letters.

Q: Category: FAMOUS MOMS 
Clue: In 1872 Julia Ward Howe, mother of 6, suggested Mother's Day but wanted it in this month, which sounds a bit late

A: june
****
Q: Category: TINY THINGS 
Clue: Access time on hard drives isn't measured in minutes, but in these units abbreviated ms

A: milliseconds
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Q: Category: BUSINESS & INDUSTRY 
Clue: It's the "rock" in Prudential's ads

A:
gibraltar
****