I'm doing a portfolio on " The human impact issues in south Carolina" and one of the questions is " How has the population in South Carolina changed over the last 20 years?" I don't understand how I would word that

Which of the following statements is true regarding a basic amino acid? a.) the hydrophilic r group of a basic amino acid will be located on the interior of a protein b.) the positively charged r group of a basic amino acid could bind dna c.) the r group of a basic amino acid would only be able to form covalent bonds with other molecules d.) a basic amino acid would be considered both polar and hydrophobic e.) all of the above