A group of students used a data logger to measure the amount of light passing through three different materials, a, b and c. The results are shown in the graph below. Based on the graph, which of the following options is correct?

• A. StatementTrueFalseNot possible to tellMaterial a allows no light to pass through it.                 
• B. StatementTrueFalseNot possible to tellMaterial b allows more light to pass through it than material c.                 
• C. StatementTrueFalseNot possible to tellMaterial c could be clear plastic sheet.                 
• D. StatementTrueFalseNot possible to tellShadow is formed by material a.