A is correct answer because just read both of them out
1 what effect will the bad weather have on our plans or
2 what affect will the bad weather have on our plans <span />
The best way to fix a run-on sentence is to add a comma, conjunction, or period. In this case, separating the sentence into 2 with a period is the best option:
Justin rushed through the obstacle course<u><em>.</em></u> He couldn't make it over the final obstacle in time.
Hope this helps! Good luck! :)
