The correct answers are A and C.
The examples D and E also present cases of artificial selection, but the traits, milk production and amount of meat are intentionally selected by the farmers.
On the other hand, in example A, the poachers are not intentionally trying to increase the number of tuskless elephants, but they are accidentally doing so because elephants without tusks are less likely going to be killed by them and have more chances of survival and leaving offspring.
The same thing happens in example C, where the individuals with smaller rams are more likely to survive.
