The main disadvantage of data furnished by standardized marketing information services over user-collected primary data is standardized data:

a. is hard to locate.
b. is generally more costly than primary data.
c. is generally less accurate than primary data.
d. may not always fit the specific needs of the user.

d. may not always fit the specific needs of the user.

Explanation:

Standardized marketing information is a secondary data which is collected for use but is already used by someone else. The main disadvantage of standardized marketing data is that is might not fit the specific needs of the user. The data collected does not satisfy the purpose of gathering information. This data can save time of the user but it will not meet the requirement for which it was collected.

The correct answer is letter "D": may not always fit the specific needs of the user.

Explanation:

While conducting researches, user-collected primary data is collected directly from users taking resources, surveys, interviews or experiments. On the other hand, standard marketing information is secondary data collected to be used when other individuals have gathered and used that information before. Secondary data may not meet the second users' needs.

explanation:

a gas is not used in hydraulic machines as the fluid because gas is easily compressible and so if a gas is used, the energy would mostly go into compressing a gas. therefore a liquid is used in hydraulic machines as the fluid.

answer: tell me how

explanation: