The correct answer is B because the others are past or the future.
i think A but i am not to sure, i know that it can mean after or like your performing something
D: Who makes recipes from the various countries, because this sentence needs a main clause to make sense.
Answer:
If you count the number of seconds between the flash of lightning and the sound of thunder, and then divide by 5, you'll get the distance in miles to the lightning: 5 seconds = 1 mile, 15 seconds = 3 miles, 0 seconds = very close. Keep in mind that you should be in a safe place while counting.
I tried my best to help :)
JUST ADD THE FILE TO THE THING