Which of the following statements is false?

Group of answer choices

a. Aside from the natural properties of the species, the most important factors that influence structural grading are density, basic grain pattern, natural defects, and moisture content.

b. Four major classifications of structural lumber are dimension Lumber, beams and stringers, posts and timbers, and decking.

c. Hardwoods such as pine, fir, and redwood mostly come from trees that are coniferous or cone-bearing.

d. 2 species of trees used extensively for structural lumber in the United States are Douglas fir and Southern pine, both of which are classified among softwoods.