The age 30 transition can be a difficult period because
a divorces are common
b. shift in the direction for future developments.
c. make a place for themselves in the adult world.
d all of the above
select the best answer from the choices provided

d all of the above

Explanation:

- divorces are common

The majority of couples that got married in their early 20s experienced economic problems in their family since it is unlikely that they have found a sustainable/reliable income at that age group.

This create a lot of divorce by the time they are 30, (according to the data from the U.S government, couples with the age of 30-31 has the highest rate of divorce)

- shift in the direction for future developments.

As people turn 30, most of them already have enough working experience in a specific field to make them eligible for promotion. This caused a shift in their future developments. Even though this usually translated to more average income, the stress level that they experience also tend to be higher.

- make a place for themselves in the adult world.

A long with financial responsibilities, people on the age of 30 also received a lot of pressures from their social group to act more 'mature' and expected to set an example for future generation. This make their roles become really different compared to what they used to during their adolescent years.

acid rain is the answer