True/False about Vector Spaces

Hello, i have a true false question about vector spaces that i cannot figure out and its part of our test review so i need to know it.

A.)The columns of an invertible nxn matrix form a basis for R^n

B.)In some cases, the linear dependence relations amoung the columns of a matrix can be affected by certain elementary row operations on the matrix.

C.)A single vector by itself is linearly dependent

D.)if H=Span(b1,.....,bp) then (b1,.....,bp) is a basis for H

E.)A basis is a spanning set that is as large as possible.

I think that A,B,C are true. Am i right? and are the others true?

Thank You,

Diggidy