In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Q: Mangroves dominate _ quarters of tropical coastlines.

A: three
****
Q: Special relativity shows that time behaves surprisingly like the _ spatial dimensions.

A: three
****
Q: Antihistamine appears to be of _ obvious benefit in preventing acute reactions from antivenoms.

A:
no
****