Sue consumes only sandwiches and soda and is at her best affordable point. The price of a sandwich falls. The substitution effect is that Sue substitutes ________ for ________. The income effect is that Sue ________.
A.
sandwiches; soda; buys less of both goods
B.
soda; sandwiches; buys more soda and fewer sandwiches
C.
sandwiches; soda; buys more of both goods
D.
soda; sandwiches; buys less soda and more sandwiches