If margarine and butter are substitute goods, which of the following will result in an...

Substitute goods can replace each other in consumption. If the price of butter increases, consumers are likely to switch to margarine, increasing its demand. Option B (increased margarine supply) shifts supply, not demand. Option C (decreased margarine supply) reduces availability, potentially increasing price but not demand. Option D (decreased butter price) would decrease margarine demand, as consumers prefer cheaper butter. This question falls under the Economics category, emphasizing demand determinants.