Identify the correct statements:A. Lenticels are the lens-shaped openings permitting the exchange of gases.B. Bark formed early in the season is called hard bark.C. Bark is a technical term that refers to all tissues exterior to vascular cambium.D. Bark refers to periderm and secondary phloem.E. Phellogen is single-layered in thickness.Choose the correct answer from the options given below:

A is correct: Lenticels allow gas exchange in woody stems.B is incorrect: Early bark is "soft bark"; late season bark is "hard bark".C is incorrect: "Bark" is a non-technical term for tissues exterior to cambium.D is correct: Technically, bark includes the periderm and the secondary phloem.E is incorrect: Phellogen (cork cambium) is a couple of layers thick.Only A and D are correct statements. (Note: Many keys accept A, C, D depending on technicality of "non-technical", but A and D are always correct).