$$5\times6=$$．  ★★~ ~ ~~ ~ ★★~ ~ ~~ ~ ★★~ ~ ~~ ~ ★★~ ~~ ~ ~~ ~ ★★  ★★~ ~ ~~ ~ ★★~ ~ ~~ ~ ★★~ ~ ~~ ~ ★★~ ~~ ~ ~~ ~ ★★  ★★~ ~ ~~ ~ ★★~ ~ ~~ ~ ★★~ ~ ~~ ~ ★★~ ~~ ~ ~~ ~ ★★ 
选项为:A:$$5+6$$  B:$$5+5+5+5+5$$  C:$$5$$ groups of $$6$$  D:$$5$$ groups of $$2$$  请回答其中一个选项.