For large samples sizes, the sample mean behaves

a. apprioximately normal (that is, according to a bell-shaped distribution).

b. approximately uniform (that is, it's equally likely to be anywherebetween its upper and lower limit)

c. approximately bimodal, like a fair coin toss (50% of the time it's one thing, 50% of the time its another)

d. badly, like a rotten child