Which of the Following Came to Be Grant's Strategy as a Commander

Which of the following came to be Grant's strategy as a commander?

A) exercising great caution and only launching offensives when absolutely necessary
B) fighting very short and spread-out battles so as to maintain an element of surprise
C) acquiring superior weapons to counterbalance the South's superior numbers
D) engaging strictly in guerrilla warfare and focusing attention on the West
E) waging a relentless war of attrition such as by confiscating or destroying civilian property