Which of the following could be factored by grouping

wy+wz+xy-xz
wx+wz-wy+wv
wx+yz-wx+yz
wy+wz+xy+xz

The expression that could be factored by grouping is:

wy+wz+xy+xz

To factor by grouping, we can group the terms as follows:

(wy + xz) + (wz + xy)

Factor out the common terms in each group:

y(w + x) + z(w + x)

Factor out the common factor "w + x":

(w + x)(y + z)

So the expression wy+wz+xy+xz can be factored into (w + x)(y + z).