Correct option A
The Marketing Departmenthas adamantly
rejected all claims
[that]
(it) was previously aware of the error- SV Agreement
- that "It" refer to Noun "The Marketing department"(due to which)- due to which, works as a contrast conjunction
- remember there is difference between (,which) and (which) usage
- due to above cause, below is the effect on salesSales of the new web-based service
have amounted to a mere 1.5 million dollars
instead of the expected 9 million dollars
- correct SV Agreement
- amounted to - correct Idiom
- instead of - correct idiom, highlights alternate event occured.
Rejected Option reason
B. - Redundancy (consequently, Caused)(Amount to, sum of , a mere)
C.- Redundancy (due to, consequently, Caused)(Amount to, a mere)
D. - wrong idiom "amounted only to"
E. - that "caused" is wrong usage, refer to near noun "error"
- wrong idiom "amounted only to" and "Sum of"