Question

grace arrived by ocean liner, and had to totter down a gangplank from a tender to meet rainier, who was bobbing about expectantly on his yacht. source: the guardian in this sentence, totter means to: make ones way deeper into or through walk unsteadily have its essential character use persuasion successfully

Explanation:

The context is about Grace walking down a gangplank which can be an unsteady surface. "Totter" means to walk in an unsteady way.

Answer:

B. walk unsteadily