I don’t get it what it the context
The answer is negative four because you must change two negatives into a positive
Grammar, spelling, pronunciation, vocabulary.
That schools need to require students to complete service hours to graduate... your welcome
...a type of commitment in which the parents of a boy and agirl agreeon having them marry.
According to the information available on this excerpt, a betrothal is a promise which can be later modified, in which the parents of a boy and a girl promise to marry them. This could also be a definition of arranged marriage.