Answer:
it's is d
Explanation:
seening this info
for every 2/3 of cold water there is 1/2 of vegetable Oil
to make this answer complte if if we add a another cup of water the amount that is requared and since were adding 1/2 of oil which is 2/3 of water need adding 2/3+2/3=4/3
Hence 4/3 or D is right