The reason for which Grace O'Malley, who was an Irish noblewoman who

1) The reason and because both in a sentence is redundant.- "a" and "E" out.
2) use of has lived is wrong tense- "C" gone.
3) As per question the non underlined part is providing the reasons - "D" is out.

We are left with "B".

The reason for which Grace O'Malley, who was an Irish noblewoman who lived in the 16th century, received the title "The Sea Queen" was because of her formidable control of ship routes and her aggressive and courageous attacks on both English and Irish noblemen's fortresses.


(A) The reason for which Grace O'Malley, who was an Irish noblewoman who lived in the 16th century, received the title "The Sea Queen" was because of Incorrect

it has redundant problem - The reason ................ was because of.................
double reason uses wrong

(B) The reason for which Grace O'Malley, an Irish noblewoman who lived in the 16th century, received the title "The Sea Queen" was Correct

(C) The reason for which Grace O'Malley, an Irish noblewoman who has lived in the 16th century, received the title "The Sea Queen" was Incorrect

tense error - has uses wrong

(D) Grace O'Malley, an Irish noblewoman who lived in the 16th century and received the title "The Sea Queen" was Incorrect

Grace O'Malley is a sentence fragment

(E) The reason that Grace O'Malley, an Irish noblewoman who lived in the 16th century, received the title "The Sea Queen" was because of Incorrect

same as A - double reason uses wrong