When Carol visits the local supermarket she buys a pack of crisps with probability 0.3, a chocolate with probability 0.4 and her favorite fruit juice with probability 0.6. The probability that she buys both crisps and chocolate is 0.2, that she buys both crisps and the fruit juice is 0.45, and that she buys chocolate and the fruit juice is 0.15. The probability that she will buy at least one of these three products in her next visit is

(a) equal to 0.3

(b) equal to 0.7

(c) equal to 0.5

(d) at least 0.5

(e) at most 0.5.