Although hand-written letters may convey personal regard as well as old-fashioned charm, harried professionals eventually recognize that letters take far more effort than writing emails do.

A) letters take far more effort than writing emails do
B) letters take far more effort to write than emails do
C) writing letters takes far more effort than emails do
D) writing letters takes far more effort than it does for emails
E) to write letters takes far more effort than for emails

OA B

Source: Princeton Review