African elephants are often poached and killed for the ivory tusks. These elephant populations are becoming reduced in size, as their poaching is larger than their population births. Recently, elephants on an African reserve are being born tuskless, and lack the tusks even as adults. Which statement is supported by the description here? 

(1 point)
Responses

The elephants are being selectively bred to have fewer tusks so that they require less land on the reserve.
The elephants are being selectively bred to have fewer tusks so that they require less land on the reserve.

A DNA mutation caused the elephants to be born tuskless.
A DNA mutation caused the elephants to be born tuskless.

The lack of tusks is a disadvantage to the organism when poaching is common.
The lack of tusks is a disadvantage to the organism when poaching is common.

A DNA mutation caused the elephants to be born with tusks.

The lack of tusks is a disadvantage to the organism when poaching is common.