What is the characteristic of a Matrix Transpose

Select the appropriate response:
A)Same columns and rows
B)First Column = 0
C)Columns are converted by rows
D)First Row = 0

Help please!

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)