Step 1: Definition of Budget Set.
The budget set is the set of all possible bundles of goods that a consumer can afford, given income and prices. Mathematically:
\[
p_1x_1 + p_2x_2 \leq M
\]
where \(p_1, p_2\) are prices of goods, \(x_1, x_2\) are quantities, and \(M\) is consumer income.
Step 2: Checking each option.
- (A) Only mentions prices and income, but not bundles → incomplete.
- (B) Correct, since budget set = all affordable bundles (within or equal to income).
- (C) Refers to producers, not consumers → wrong.
- (D) Mentions bundles, but doesn’t include affordability → incomplete.
Step 3: Conclusion.
Hence, option (B) is the most accurate definition.
Final Answer:
\[
\boxed{\text{Any bundle as long as it costs less than or equal to the income.}}
\]