So let's begin with A. Now, remember, this plus and minus does not mean charge. It means, for example, the plus means that we're combining the one s positive orbital and the two p positive orbital. Now, when we combine the two positive orbitals, we get the following figure. When we combine the positive one S orbital and the negative one two p orbital, we get the following interaction. To get the negative two p, we simply switch it or flip it.