When connecting wires for a circuit you must... A. make sure the conductor are touching and secure.
B. make sure at least one conductor is touching and secure.
C. make sure the insulators are touching and secure.
D. make sure at least one insulator is touching and secure.

Python. primary u.s. interstate highways are numbered 1-99. odd numbers (like the 5 or 95) go north/south, and evens (like the 10 or 90) go east/west. auxiliary highways are numbered 100-999, and service the primary highway indicated by the rightmost two digits. thus, the 405 services the 5, and the 290 services the 90. given a highway number, indicate whether it is a primary or auxiliary highway. if auxiliary, indicate what primary highway it serves. also indicate if the (primary) highway runs north/south or east/west.