Which sentence contains correct capitalization?

Question

A: When dry-stacking a stone wall, you need these items: A stonemason’s hammer, gloves, flat stones, and gravel.

B: dry-stacking a stone wall, you need these items: a stonemason’s hammer, gloves, flat stones, and gravel.

C: When dry-stacking a stone wall, You need these items: a stonemason’s hammer, gloves, flat stones, and gravel.

Answer 1

A: When dry-stacking a stone wall, you need these items: A stonemason’s hammer, gloves, flat stones, and gravel.