Which of the Following Best Matches the Description

Which of the following best matches the description?
-Combination of all environmental influences that tend to keep populations stable.

A) stable equilibrium phase
B) exponential growth phase
C) biotic potential
D) carrying capacity
E) r-strategist
F) lag phase
G) K-strategist
H) environmental resistance
I) none of above
J) population density
K) density-dependent limiting factor
L) death phase
M) density-independent factor
N) dispersal
O) age distribution
P) emigration
Q) immigration