Q625577 - CPCON - 2017 - Prefeitura de Remígio - PB - Professor - Inglês

In the sentence " then it may not be the tool to study language Changes __ and therefore may not be as innate as UG suggests." (lines 17- 18) the word therefore is

a) a conjuction.
b) an adverb.
c) a pronoun.
d) a predeterminer.
e) a determiner.