If a Consumer Spent Their Entire Income on Crisps and Cola

Multiple Choice

If a consumer spent their entire income on crisps and cola, what would happen if the consumer's income were to double and the prices of crisps and cola were also to double?

A) The consumer's budget line would remain unchanged.
B) The consumer's budget line would shift outward but remain parallel to the original budget line.
C) The consumer's budget line would shift inward but remain parallel to the original budget line.
D) The consumer's budget line would shift in an unpredictable way.