There’s a missing connective in each of the following sentences I, II and ...

There’s a missing connective in each of the following sentences I, II and III:

I. Brooke Ellison is a quadriplegic girl. _________ her difficulty, she remains active. II. You had better write down her phone, _________ you won’t be able to remember it. III. You could attend the meeting _________ you don’t accuse anyone. The alternative that respectively brings the correct connective for each one is