Can this Boolean expression be simplified?
With the basic gates it can not be simplified any further.

My solution was:

!B( (!CD) + !D(AC + !(A+C) )


When "exclusive or" is allowed:

!B( (!CD) + !D!(A xor C) )


Choose whatever suits you best.

By the way, race conditions are a problem of a logic circuits (glitch), but they can't be used for simplification.