Which statement is true about expert systems?
a. expert systems can produce results from sources beyond the knowledge base
b. expert systems can find patterns in data and generalize rules for other data
c . expert systems can infer the knowledge based on cause and effect
d . expert systems retain their knowledge base permanently

answer: this is not a question

step-by-step explanation: this is a answer

my dear correct answer is option number 3

answer: c

substitute in the values.

for a:

f(0) = 0 + 9

f(0) = 9

a is a solution.

for b:

f(7) = 14 + 9

f(7) = 23

b is a solution.

for c:

f (3) = 6 + 9

f(3) = 15

c is not a solution. it's supposed to be 14.

for d:

f(2) = 4 + 9

f(2)= 13

d is a solution.