Why the various Generals of the Army of the Potomac before Ulysses S. Grant, such as McClellan and Meade, were singularly so unsuccessful against Robert E. Lee have been debated extensively in up to 500 historical journals.
(A) singularly so unsuccessful against Robert E. Lee
have been debated extensively in up to
IncorrectWhy the various Generals of the Army of the Potomac before Ulysses S. Grant, such as McClellan and Meade, were singularly so unsuccessful against Robert E. Lee - i think subject is singular, so have should be has
(B) so singular and unsuccessful against Robert E. Lee has been debated
as extensive in Incorrectas extensive in - unidiomatic and changes meaning
(C) so singularly unsuccessful against Robert E. Lee
was extensively debated in up to Incorrectsentence should not be in past form. debate started in past, and it continues in present
(D)
so singularly unsuccessful against Robert E. Lee has been debated extensively in as many as Correct(E) so singularly and unsuccessfully against Robert E. Lee
have been debated extensively in as many as
Incorrectsame as A - SV error