A single strand of DNA, 20 nucleotides long, with the sequence 5'--3' is in a test tube. What else needs to go in the test tube to so that we end up with a piece of double stranded DNA, 20 base pairs long, with the above sequence comprising one of the two strands

the correct answer is b

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.