Regarding the code optimization, choose the correct sequence A. Algebraic…

Correct sequence: Redundant-instruction elimination → Flow of control optimization → Algebraic simplification → Use of machine idioms → Improved target code

• Redundant-instruction elimination: Remove unnecessary or duplicate instructions early to reduce code size and expose further optimization opportunities.

• Flow of control optimization: Reorganize branches and loops, merge basic blocks, and simplify control structures so later optimizations can work on a cleaner control-flow graph.

• Algebraic simplification: Simplify arithmetic expressions and apply strength reduction to lower computational cost; doing this after flow improvements often exposes further simplifications.

• Use of machine idioms: Apply target-specific patterns and instruction sequences to exploit hardware features; perform this after machine-independent optimizations to avoid tying early passes to a specific architecture.

• Improved target code: Emit the final optimized target code, incorporating all prior improvements and any last-minute, target-aware adjustments.

Rationale: Perform machine-independent, general optimizations first (removing redundancies and improving control flow) so that algebraic simplifications and later machine-specific optimizations operate on a cleaner, smaller codebase. Finally, apply target-specific idioms and produce the final target code.