What is the root word in curiosity?

mid-14c., "subtle, sophisticated;" late 14c., "eager to know, inquisitive, desirous of seeing" (often in a bad sense), also "wrought with or requiring care and art;" from Old French curios "solicitous, anxious, inquisitive; odd, strange" (Modern French curieux) and directly from Latin curiosus "careful, diligent; inquiring eagerly, meddlesome," akin to cura "care" (see cure (n.)).

Explanation:

the percentage of students at the school need special diets is

c) 10 percent

(b) britain had a much larger navy than the u.s.

(d) the u.s. had a small army compared to britain.