Someone plz help!!!!!!!!
 The table shows different geologic time periods: 
 Period Number of Years Ago 
 Jurassic 2.08 ⋅ 10^8 
 Silurian 4.38 ⋅ 10^8 
 Tertiary 6.64 ⋅ 10^7 
 Triassic 2.45 ⋅ 10^8 
 Order the time periods from oldest to youngest. 
 A. Tertiary, Jurassic, Triassic, Silurian
 B. Jurassic, Triassic, Silurian, Tertiary 
 C. Silurian, Triassic, Jurassic, Tertiary
 D. Triassic, Silurian, Jurassic, Tertiary