Which option completes the sentence below correctly? Spinach is very thin, so th...

Questão de Inglês da banca Marinha aplicada no concurso ESCOLA NAVAL (2020). Confira a resolução completa abaixo:

Which option completes the sentence below correctly?
Spinach is very thin, so there's more loss of moisture and exposure to heat and oxygen compared to a carrot,_______ ?
(Adapted from https://www.bbc.com)