Answer:
1/4
Explanation:
1/2 and 3/4 have different denominators. What we can do is change the denominator of 1/2. 1/2 equals 2/4. 1/4+2/4=3/4
The answer would most likely be (D) Primordial.
However, (C) Avant-garde, is completely legit too I suppose.
Personally I would choose (D) as my answer as it seems to make the most sense.