Final answer:
The correct option is B. The distance of 16.0 inches between vertical studs, when converted to centimeters, is 40.64 centimeters.
Step-by-step explanation:
The question pertains to the size of lumber that should be used for wooden supporting members between jacks as per CAL/OSHA standards. The correct size is not directly provided within the question, which seems to present a selection of standard lumber sizes often used in construction.
However, the question also asks how to convert the distance typically spaced between vertical studs from inches to centimeters. To calculate this, you would use the conversion factor where 1 inch is equal to 2.54 centimeters. Therefore, vertical studs that are 16.0 inches apart would be 16.0 inches x 2.54 cm/inch = 40.64 centimeters apart.