Select the correct answer. What is the best way to check the reliability and validity of a resource?
OA.
Determine the resource's original medium of production.
B.
Analyze the author's education and professional background.
DC.
Establish how many years separate each resource's publication.
D.
Investigate the main idea of the resource you discover.

Correct answer is A.  Determine the resource's original medium of production.

Explanation:

A is correct answer because it is important to know how reliable the source - is it forged or not, and its validity - to see if the information contained there are true.

B is wrong because it is not important who the author is, but is he reliable enough.

C is wrong because it doesn't matter how many time the resource has been published, if it is not reliable.

D is not important, because idea itself is not telling us enough about its importance and validity.

164 kids

165 adults

step-by-step explanation:

first you need to make two equations

kids = x

adults = y

first equation = x+y=329

second equation = 1.5x + 4y = 906

solve by substitution

x = 329 - y

1.5 (329 - y) + 4 y = 906

493.5 - 1.5y + 4y = 906

combine like terms

2.5y = 412.5

y = 165

plug back into one of the equations

x + 165 = 329

x = 164