Which statement correctly contrasts plant- and microbe-derived food toxins?

Microbe-derived toxins are only a concern when organisms are still alive on food; once microbes are killed their toxins are always inactive and harmless, so microbial toxins are not a long-term concern.

Plant toxins and microbe toxins are indistinguishable biologically and therefore require identical regulatory oversight, monitoring protocols, and cooking treatments to render foods safe.

Plant-derived toxins are produced as part of plant metabolism (e.g., solanine, cyanogenic glycosides), while microbe-derived toxins are produced during microbial growth (e.g., staphylococcal toxins, botulinum toxin).

Plant toxins such as solanine always require ingestion of roots to cause harm, whereas microbial toxins always require inhalation or dermal exposure to cause illness, not ingestion.