How many parts by weight-of 30% cream and 4% milk must be mixed to milk testing 5% fat
A2 parts of 30% cream and 15 parts of 4% milk must be mixed
B3 parts of 30% cream and 18 parts of 4% milk must be mixed
C1 part of 30% cream and 25 parts of 4% milk must be mixed
D1 part of 30% cream and 20 parts of 4% milk must be mixed