The gradient is found in the least-square method by solving ____________(Note: n is the number of dimensions)

The gradient is found in the least-square method by solving __________

1.	The gradient is found in the least-square method by solving ____________ (Note: n is the number of dimensions)
A.	a system of n equations
B.	a single equation
C.	a system of n<sup>2</sup> equations
D.	a system of 2n equations
Answer» B. a single equation