Which multiple choice is correct: During the class, we discussed the automobile industry during the early $20$th century. How did Henry Ford revolutionize the car production?

a$.$ He offered a higher wage than the market rate to low skill workers.

b$.$ He transformed the car production process from Job Shop to Repetitive.

c$.$ He reduced the cost of car production by adapting a Batch process.

d$.$ He standardized product offering in Model T

$.$