The following is true about inhalants:
a. doses vary because of individual lung capacities.
b. they reach the blood stream within 10 mins after inhalation. c the products used are illegal for purchase by minors.
d. effects last for days

This is the most closely resembles the model. 

D. china is one of the most active places, which could quite possibly mean more agriculture will happen.. and more war machi-    best of luck comrade.

The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.