If You Had to Either Include an Irrelevant Variable or Omit

Multiple Choice

If you had to either include an irrelevant variable or omit a relevant variable,you would prefer

A) including an irrelevant variable over omitting a relevant variable because omitting a relevant variable leads to biased estimates.
B) including an irrelevant variable over omitting a relevant variable because omitting a relevant variable leads to the standard errors to increase.
C) omitting a relevant variable over including an irrelevant variable because omitting a variable does not affect the estimated coefficients.
D) omitting a relevant variable over including an irrelevant variable because including an irrelevant variable does not lead to biased estimates.