Which of following is the best way to correct this run-on sentence? When the biology class identified a new species of
butterfly they took careful notes they also took detailed
pictures.
A. When the biology class identified a new species of butterfly. They
took careful notes. They also took detailed pictures.
B. When the biology class identified a new species of butterfly, they
took careful notes. They also took detailed pictures.
C. When the biology class identified a new species of butterfly. They
took careful notes. They also took detailed pictures.
D. When the biology class identified a new species of butterfly, they
took careful notes, they also took detailed pictures. They

B. When the biology class identified a new species of butterfly, they  took careful notes. They also took detailed pictures.

Explanation:

Run-on sentences are when two or more independent clauses are improperly connected. This means that the independent clauses are joined in such a way that the sentence seems awkward and incorrect.

In the given sentence, the first part is a dependent clause as it begins with a subordinating conjunction "when". The second and third parts of the sentence are independent clauses.

Now, a dependent clause requires an independent clause to be a complete sentence so, the dependent clause and the second sentence will be joined together with the use of a comma in between. Then, the third sentence will be a separate sentence of its own.

So, the correct answer is option B.  

yes, no, maybe, so i honestly don't know best of luck

the climax is the highest peaking point of the movie it is mostly near the end of the movie where the main characters point of view changes. it is the most excting action part of the movie