Question

complex sentences
fill in the blank.
i rode in a boat when i visited europe.
the conjunction in the middle means _?_.
two periods are needed
no comm is needed
a question mark is needed

Explanation:

In complex sentences, when the dependent clause (here "when I visited Europe") follows the independent clause ("I rode in a boat"), no comma is used. A period is for ending sentences, and a question mark is for questions. This sentence is a statement, not a question.

Answer:

no comma is needed