Most road repairs cost more time and money than budgeted, but the maintenance of the Beijing-Tianjin-Tangtang Expressway and similar roads did not cost more time or money than budget. Main roads may save time and money. Which of the following, if correct, most supports the conclusions obtained above? ['The budget for the maintenance of the Beijing-Tianjin-Tangtang Expressway is sufficient, so it is impossible to exceed the budget.', 'In summer, there are fewer vehicles on the road at night and the temperature is more comfortable, allowing road repair workers to work faster.', 'Road workers who are willing to work at night are more likely to find job opportunities because most people prefer to work during the day.', 'Asphalt used for road maintenance expands at higher temperatures and shrinks when the temperature decreases.']