It will be difficult for B to be found to be superior to D on the primary efficacy measure in this test. This is because of the way the test is evaluated. We can figure D to have 95-97% efficacy. Even 100% for B would not be statistically different.
The key for single dose B is to equal D's efficacy, and therefore beat it soundly on ease of use, compliance and cost (do we know that cost is lower?). If B equals D efficacy in this test, then there is a good chance it will become the standard of care in acute bacterial skin and skin structure infections, or ABSSSI.
We don't have that much longer to wait....less than a year.