I would say the answer would probably be initiate worker training program’s
Pretty sure the answer is C. If not, then it's B.
B. a line connecting only the highest and lowest values on a graph
Answer:
P versus NP.
Hodge conjecture.
Riemann hypothesis.
Yang–Mills existence and mass gap.
Navier–Stokes existence and smoothness.
Birch and Swinnerton-Dyer conjecture.
Explanation: