Question

Which punctuation mark belongs at the end of the sentence?

Dandelion flowers are yellow

A.
.

B.
?

C.
!

Answer 1

If it was a question, then it would have been:
«Are Dandelion flowers yellow?»

I don't see any error, really, in putting an exclamation mark, but to me it seems as though it is a ...

Answer 2

Which is the correct way to divide the sentence between the complete subject and the complete predicate?

The tired boy slowly climbed into his bed.

A.
The tired boy slowly climbed / into his bed.

B.
The tired boy slowly / climbed into his bed.

C.
The tired / boy slowly climbed into his bed.

D.
The tired boy / slowly climbed into his bed.