You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).

Paragraph: At higher concentrations, particles of reactants are crowded closer together, so they are more likely to collide and react.
 Question: DJ has a solution that he adds particles to. The solution is now a _____ concentration. 
 Choices: A)higher 
B)lower
higher

Paragraph: Breast cancer is rare in teens. It becomes more common as women get older.
 Question: Dana goes with her mother to get screened for breast cancer. The person who is more likely to have it has an age that is 
 Choices: A)higher 
B)lower
higher

Paragraph: Objects with greater mass have a stronger force of gravity between them.
 Question: Jupiter and Saturn are much larger in mass than Earth and Venus, therefore the force of gravity between Jupiter and Saturn is _____ than the force of gravity between Earth and Venus. 
 Choices: A)greater 
B)lesser

greater