The pilot-in-command has the authority to:

Never refuse dangerous goods if properly documented

Refuse to carry dangerous goods if safety is in question

Correct

Only refuse Class 1 (explosives)

Delegate DG decisions to ground staff entirely

Explanation

The pilot-in-command has final authority and may refuse to carry dangerous goods if they believe safety would be compromised.

Test yourself with random questions from Operational Procedures and all other ATPL subjects.