Which of the following sentences contains a conjunction?

The word "and" is a conjunction that joins two related actions.

B is punctuated correctly because it uses the comma correctly to separate the introductory clause from the main clause.

The prefix "ir-" (meaning "not") combined with the suffix "-ible" (meaning "able to be") forms the word "irresistible," which describes something that is too enticing or powerful to be resisted.

"Similarly" is used to indicate that something is done in a similar manner or order to what was just mentioned, which implies a sequence or continuation of ideas.

Similarly is a transitional expression that is used to show sequence.

I walked all three dogs around the park this morning

The word "crucial" is the only correct spelling and fits the context of the sentence.

A topic sentence should encapsulate the main idea or point of the paragraph, giving the reader a clear understanding of what to expect in that paragraph.

is complex as it contains an independent clause ("I hurriedly brushed my teeth while breakfast was warming up") and a dependent clause ("Since time was running short") linked by the subordinating conjunction "since." This combination makes it a complex sentence.