What does the error message "runtimeerror: where expected condition to be a boolean tensor, but got a tensor with dtype float torch" indicate in PyTorch?
a) The PyTorch runtime encountered a boolean tensor when it expected a float tensor.
b) The PyTorch runtime encountered a float tensor when it expected a boolean tensor.
c) There is no error in the PyTorch code.
d) The PyTorch runtime encountered an issue unrelated to tensor types
