Choose the revision to the sentence that is a correctly punctuated compound sentence. If no change is needed, select "No correction is necessary."
The house was unattractive, I didn't buy it.
The house was unattractive which is why I didn't buy it.
I didn't buy the house because it was unattractive.
The house was unattractive, so I didn't buy it.
No correction is necessary.

The house was unattractive, so I didn't buy it.

although mowgli is no longer accepted by the pack, he will always love his mother and brothers.

the president was the speaker and it was a great part of history.

explanation:

video of the national aeronautic space administration's (nasa) coverage of president john f. kennedy’s address at rice university, houston, texas, concerning the nation's efforts in space exploration. in his speech the president discusses the necessity for the united states to become an international leader in space exploration and famously states, "we choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard."