When seed plants first begin to sprout, they will have either one or two leaves. this is a characteristic trait that can be used to identify what kind of plant is growing. how does this evidence support the theory of evolution

a Each type of plant has evolved independently to form the correct number of leaves it needs
b The plants with two leaves are more complicated than the ones with only one leaf, so they must have evolved first
c The plants with one leaf are found later in the evolutionary history of plants, so they evolved more recently
d Regardless of how many leaves they produce, all seed plants evolved from a single, common ancestor