A. Two directions without break in the slope on each side B. Two directions with break in the slope on each side C. Four directions without break in the slope on each side D. Four directions with break in the slope on each side
A. Arches require more headroom to span the openings like doors, windows etc. B. Arches require strong abutments to withstand arch thrust C. Arches are difficult in construction D. All of the above