Let be an linear transformation
from
to
.
Let be the matrix associated to .

Fill in the correct answer
for each of the following situations.

1. Every row in the row-echelon form of has a pivot. 2. Two rows in the row-echelon form of do not have pivots. 3. The row-echelon form of has a row of zeros. 4. The row-echelon form of has a pivot in every column.

A. T is onto
B. T is not onto
C. There is not enough information to tell.