Most road repairs require more time and money than is budgeted, but last summer' s nighttime repairs of Highway 93 and similar roads required no more time or money than had been budgeted. Ttherefore, making summer repairs to major roads at night would save both time and money. Which of the following, if true, most strongly supports the conclusion drawn above? ['Asphalt used in road repair tends to expand in warmer temperatures and contract in cooler temperatures.', 'The budget for the repairs to Highway 93 was generous enough to make it unlikely that it would be exceeded.', 'The smaller number of cars on the roads at night and more comfortable nighttime temperatures allow road workers to work more quickly.', 'Road repair crews that work at night mark their work sites with bright hashing lights in addition to the orange cones they use during the daytime.']