Due to which of the following, the irregular variations in a time series are caused:

(A) Floods
(B) Rise in prices before festivals
(C) A fire in a factory
(D) Epidemics

Choose the correct answer from the options given below:

(A), (C) and (D) only

The correct answer is Option (3) → (A), (C) and (D) only

Irregular (random) variations are caused by unpredictable, accidental events.

(A) Floods ✔ (irregular)

(B) Rise in prices before festivals ✘ (seasonal variation)

(C) A fire in a factory ✔ (irregular)

(D) Epidemics ✔ (irregular)

Correct: (A), (C), (D)