Total heat lost by the steam as it condenses and reaches 50°C.
heat =

b would be the answer

and 1and 1

it is called kinetic energy

the answer would most likely be c, because if it's a comical piece of information, it may likely not be true, if it's a site that allows anybody to edit the content, it could mean a five year old is typing the info, and if it's a tv show produced by a celeb, it may have a biased opinion.