Help ! do not know if i am right

Which statement best describes the relationship between an allele and a gene? question 1 a. an allele is a variation of a gene that can be expressed as a phenotype. b. an allele is the part of a gene that attaches to messenger rna molecules. c. an allele is a segment of a dna molecule that controls replication of a gene.

Two critical interventions to turn around the opioid crises are:

Idon’t understand this can someone give me the answer? you