Why Did the Venera Series of Spacecraft Survive for Only

Why did the Venera series of spacecraft survive for only a few minutes on Venus's surface?

A) They landed very fast because there was insufficient atmosphere to slow down their descent.
B) Conditions of extreme pressure, corrosive atmosphere, and high temperatures caused severe damage.
C) They were attacked and destroyed by native inhabitants, but the space agency is not telling the world of this.
D) They landed in very rugged terrain and were not able to land upright; they became damaged when they toppled over.