After converting all measurements to inches, it is determined that Board B is the shortest with a length of 41 inches.
The question asks to determine which board is the shortest from a list of boards with lengths given in different units (feet, inches, and yards).
To find the shortest board, we need to convert all measurements to the same unit. We can choose to convert all lengths to inches for precision. Here are the conversions:
Board A: 3.5 feet x 12 inches/foot = 42 inches
Board B: 41 inches (already in inches)
Board C: 4 feet x 12 inches/foot = 48 inches
Board D: 1.25 yards x 3 feet/yard x 12 inches/foot = 45 inches
After conversion, it's clear that Board B is the shortest at 41 inches. The other boards (A, C, and D), when converted to inches, all measure more than 41 inches.