Those sentence are using customary abbreviation for ''that is'' or ''id est'' and that is i.e. which is always written with full stop so the answer B) could not be correct.
When we are using a percentage, it is correct to write the numbers as it should and not with words, so the answer A) is not correct to.
Forty-three is correctly written and it should be written like that while other whole numbers could be written in a different way.
