Please help with both

QUESTION 29 Ang et al. (2018) study the impact of speed limit changes in Sao Paolo on driving times and accidents. What are their main findings about the costs and benefits of speed-limit reductions? O A. The travel time benefits of speed limit reductions were larger than the costs of fewer traffic accidents. O B. The travel time costs of speed limit reductions were smaller than the benefits of fewer traffic accidents. O C. The travel time benefits of speed limit reductions were smaller than the costs of fewer traffic accidents. O D. The travel time costs of speed limit reductions were larger than the benefits of fewer traffic accidents. QUESTION 30 What is a policy implication of the fundamental law of highway congestion? A. A wider highway will generate short term improvements in traffic conditions, but widening is not an adequate long-run policy response because demand for the faster highway will increase. O B. Widening highways are the most efficient way to improve traffic conditions, and more funding needs to be allocated to increasing lane width. O C. Increasing highway width by one lane increases road capacity by a small amount because of traffic congestion. O D. Widening highways will not generate improvements in traffic conditions, because fundamentally, highways are always congested