Which best describes how the oxygen molecules will move? a. oxygen will move from an area of higher concentration (inside the cell) to an area of lower concentration (outside the cell). b. oxygen will move from an area of lower concentration (outside the cell) to an area of higher concentration (inside the cell). c. oxygen will move from an area of lower concentration (inside the cell) to an area of higher concentration (outside the cell). d. oxygen will diffuse from an area of higher concentration (outside the cell) to an area of lower concentration (inside the cell).