Sunita, who is 52 years old, applied for a CPP survivor's pension following the death of her husband. At the time of his death, Sunita's husband would have been entitled to a CPP retirement benefit of $925 per month. If the flat rate portion of the survivor's pension is $186.51 and the maximum survivor's benefit is $604.32, how much will Sunita receive in CPP survivor benefits?

a) $186.51

b) $346.88

c) $533.39

d) $555.00