What is the greatest width allowed by state law for a truck including the load?

Answer: B — 102 inches

In Texas, the maximum width allowed by state law for a truck, including its load, is 102 inches. This measurement is established to ensure safety on roadways and to account for the dimensions of infrastructure such as bridges and tunnels. Staying within this width limit helps prevent potential hazards that could arise from oversized loads, such as limited maneuverability and increased risk of accidents. The other options, while they may represent measurements used in other contexts, exceed the legal limit set by Texas law. Trucks that are wider than 102 inches would typically require special permits, which have additional regulations and liabilities associated with them.