You can expect to see . A. STOP signs or traffic lights on limited access highways
B. only traffic lights on limited access highways
C. only STOP signs on limited access highways
D. no STOP signs or traffic lights on limited access highways

When looking at research about instructional strategies, make sure the research is a. from peer-reviewed studies. b. approved by state and federal government organizations. c. online and easily accessible. d. about the same topic you're interested in.