Oh sorry but this isnt english so i cant help with this u shouldnt have clicked history
Answer:
D. Most infants died before childhood.
Explanation:
Unfortunately, most children fell to disease and harsh conditions. Back then medicine was not evolved as it is now and most would die of the common cold. But it was also customary to have large families in order to support the family so kids often were used as labor and died in unfortunate accidents or from exhaustion. Today, there are many many laws protecting children from such things and medicine has evolved so most people in wealthy countries could live up to 70 years old if they take care of themselves.
The second option is correct
C because a market research helps when you are buying something which he is (car) and this is a secondary resource because it is recommended by someone rather than them finding the research himself.
