(A) 5
(B) 10
(C) 15
(D) ** 20
EXPLANATIONS BELOW
Concept note-1: -A score is twenty or approximately twenty.
Concept note-2: -A ‘score’ is a group of 20 (often used in combination with a cardinal number, i.e. fourscore to mean 80), but also often used as an indefinite number (e.g. the newspaper headline “Scores of Typhoon Survivors Flown to Manila").
Concept note-3: -The noun ultimately comes from the Old Norse skor, meaning “notch or tally” or “20.” The verb ultimately comes from the Old Norse skora, meaning “to notch” or “to count by tallies.”
Concept note-4: -Numeral. onescore. (archaic, rare) Twenty (20).
Concept note-5: -being or containing three times twenty; sixty.