Which one is the answer help

Why is causation so much more difficult to prove than correlation?

According to the national center for health statistics, in 1990, 28 % of babies in the united states were born to parents who were not married. throughout the 1990s, this increased by approximately 0.6 % per year. if this trend continues, in which year will 52 % of babies be born out of wedlock? in__52 % of babies will be born out of wedlock

Mabel paid $2.95 for a granola bar dimes and quarters. she used five few were quarters then dimes. how many dimes and quarters did she use to pay for the granola bar.