Paul fell down and broke his wrist，____________ was a pity．

A．which

B．what

C．that

D．it

根据我国《保险法》的规定，投保人帮意或者因重大过失示履行如实告知义务，足以影响保险人决定是否同意承保或者提高保险费率的，保险人有权解除合同。