can we work on this problem

Question 6 1 pts What directly activates S-phase cyclins ? O A kinase that activates an inhibitor of S-cyclins. O Ubiquitination and degradation of an inhibitor of S-cyclins. A kinase that activates an activator of S-cyclins. O A phosphatase that inhibits an inhibitor of S-cyclins. O A phosphatase that activates an activator of S-cyclins