Final answer:
The mileage chart at the top of the Texas state map in the Motor Carrier Atlas is the most reliable option to calculate the miles between El Paso, TX and Houston, TX.
Step-by-step explanation:
The correct answer is B. The mileage chart at the top of the Texas state map in the Motor Carrier Atlas. This chart will provide you with the accurate distance between El Paso, TX and Houston, TX. You can refer to the mileage indicated on the chart to calculate the miles between the two cities.
Option A, the mileage chart at the back of the Motor Carrier Road Atlas, may not specifically provide the precise mileage for El Paso and Houston. Option C, the mile markers shown on I-10, can give you an estimate of the distance, but it may not account for detours or alternate routes.
Therefore, the most reliable option is the mileage chart at the top of the Texas state map in the Motor Carrier Atlas.