How many bakers in the competition can make a red velvet cake if there are 210 bakers, the number of bakers who can make a red velvet cake is twice the number of bakers who can make a carrot cake, and the number of bakers who can make both types of cake is 30 more than the number of bakers who cannot make either?
a) 120
b) 140
c) 150
d) 180