(Choose 1 answer)
To force clients to set a value, make the property nullable and set the Required attribute
A. [RequireAttribute(0, 999)]public decimal? Price { get; set; }
B. [RequiredNotNull]public decimal? Price {get; set; }
C. [RequiredRange(0, 999)]public decimal? Price { get; set; }
D. [Required]
public decimal? Price {get; set; }
