(More than one answer may be correct.)

A.  The protestors would cheer and high-five each other.

B.  The protestors would then request the officer assume a “more” defenseless posture.  (If they are sincere in praying for peace, they will not denigrate/degrade others or require anything of others.  That would be something besides prayer.)

C.  The police officer would be reprimanded for praying in uniform and suspended for violating the so-called law of the separation of church and state, which is not a law.

D.  The police officer would be fired for praying in uniform for violating the so-called law of the separation of church and state, which is not a law.

E.  Any of the above

F.  All of the above

It probably won’t translate well:  Garder votre poudre sèche,

Je suis Spike